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Overview

Distribution

This species is distributed on northern Mexico, mainly in the State of Nuevo León, running south to Tamaulipas, and entering the State of Coahuila.

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Ecology

Habitat

It grows mainly on vertical walls and cliffs, is restricted to calcareous rocks.

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Agave bracteosa

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 2
Species With Barcodes: 1
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Source: Barcode of Life Data Systems (BOLD)

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Wikipedia

Agave bracteosa

Agave bracteosa is a species of agave sometimes known as "spider agave".

Small among the agaves, its green succulent leaves are long and lanceolate, 50-70 cm long and 3-5 cm at the base, where they are the widest. They have minute serrations along the margins, no teeth, no spine at the end, and have a tendency to curl somewhat, in a fashion reminiscent of the octopus agave A. vilmoriniana. The inflorescence spike is also short at 1.2-1.7 meters, and its upper third is densely covered with white or pale yellow flowers. The flowers are distinctive in that tepals arise from a disk-shaped receptacle rather than the usual tube. The stamens are quite long.

It is endemic to a small region of the northern Sierra Madre Oriental of Mexico, found on cliffs and rocky slopes from 900 to 1,700 meters.

Gentry defines a group "Choritepalae" that includes A. bracteosa along with Agave ellemeetiana and Agave guiengola, and states that the discoid receptacle and unarmed leaves are different enough from other agaves to justify placing A. bracteosa and A. ellemeetiana into a separate genus, but that characteristics of A. guiengola link the group to the rest of Agave.

References

  • Howard Scott Gentry, Agaves of Continental North America (University of Arizona Press, 1982) pp. 91-93
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